参上
さんじょう · sanjou · JLPT N1 · noun
calling on
🚪 参 = go to see + 上 = up to a superior: a humble way to say you called on someone
参 means to go and see or call on, and 上 means up or toward a superior. Together, 参上 is the polite form used when you arrive at someone's door to visit.
上 — horizontal line above a baseline
上 is an indicative character (指事): a short stroke placed above a longer reference line shows the concept of 'above' or 'up'. The earliest oracle-bone forms used two horizontal lines for this; the modern shape added a vertical stroke for clarity. The core meaning of 'upper, above, to ascend' has stayed stable for millennia.